BrantfordCentralSchool appears as a subject but brantfordCentralSchool as an object.
http://alpha.huviz.dev.nooron.com/#load+https://raw.githubusercontent.com/cwrc/testData/master/demoData/CanAuthorsBiography.ttl+with+http://sparql.cwrc.ca/ontology/cwrc.ttl
Presumably the intention is that they are the same node, but case matters, so they don't match and HuViz isn't graphing them as intended.